DellEMC S6000 : Platform2.0 API implementation [PSU, Thermal] (#3357)

* DellEMC S6000 : Platform2.0 API implementation [PSU, Thermal]

* Fix invalid number of arguments error

* DellEMC S6000 : Platform2.0 [ Thermal ]

* DellEMC S6000 : Platform2.0 API [PSU, Thermal]

* Updated merge changes

platform/broadcom/sonic-platform-modules-dell/s6000/modules/dell_s6000_platform.c

@@ -549,6 +549,18 @@ static ssize_t get_psu1_status(struct device *dev, struct device_attribute *deva
     return sprintf(buf, "%d\n", data);
 }
 
+static ssize_t get_powersupply_status(struct device *dev, struct device_attribute *devattr, char *buf)
+{
+    int data;
+    struct cpld_platform_data *pdata = dev->platform_data;
+
+    data = dell_i2c_smbus_read_byte_data(pdata[master_cpld].client, 0x3);
+    if (data < 0)
+        return sprintf(buf, "read error");
+
+    return sprintf(buf, "%x\n", data);
+}
+
 static ssize_t get_system_led(struct device *dev, struct device_attribute *devattr, char *buf)
 {
     int ret;
@@ -1126,6 +1138,7 @@ static DEVICE_ATTR(psu0_prs, S_IRUGO, get_psu0_prs, NULL);
 static DEVICE_ATTR(psu1_prs, S_IRUGO, get_psu1_prs, NULL);
 static DEVICE_ATTR(psu0_status, S_IRUGO, get_psu0_status, NULL);
 static DEVICE_ATTR(psu1_status, S_IRUGO, get_psu1_status, NULL);
+static DEVICE_ATTR(powersupply_status, S_IRUGO, get_powersupply_status, NULL);
 static DEVICE_ATTR(system_led, S_IRUGO | S_IWUSR, get_system_led, set_system_led);
 static DEVICE_ATTR(locator_led, S_IRUGO | S_IWUSR, get_locator_led, set_locator_led);
 static DEVICE_ATTR(power_led, S_IRUGO | S_IWUSR, get_power_led, set_power_led);
@@ -1150,6 +1163,7 @@ static struct attribute *s6000_cpld_attrs[] = {
     &dev_attr_psu1_prs.attr,
     &dev_attr_psu0_status.attr,
     &dev_attr_psu1_status.attr,
+    &dev_attr_powersupply_status.attr,
     &dev_attr_system_led.attr,
     &dev_attr_locator_led.attr,
     &dev_attr_power_led.attr,

platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/__init__.py

@@ -1,2 +1,2 @@
-__all__ = ["platform", "chassis", "sfp"]
+__all__ = ["platform", "chassis", "sfp", "psu", "thermal"]
 from sonic_platform import *

platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/chassis.py

@@ -16,11 +16,15 @@
     from sonic_platform.sfp import Sfp
     from sonic_platform.eeprom import Eeprom
     from sonic_platform.fan import Fan
+    from sonic_platform.psu import Psu
+    from sonic_platform.thermal import Thermal
 except ImportError as e:
     raise ImportError(str(e) + "- required module not found")
 
 
 MAX_S6000_FAN = 3
+MAX_S6000_PSU = 2
+MAX_S6000_THERMAL = 10
 
 BIOS_QUERY_VERSION_COMMAND = "dmidecode -s system-version"
 #components definitions
@@ -75,6 +79,14 @@ def __init__(self):
             fan = Fan(i)
             self._fan_list.append(fan)
 
+        for i in range(MAX_S6000_PSU):
+            psu = Psu(i)
+            self._psu_list.append(psu)
+
+        for i in range(MAX_S6000_THERMAL):
+            thermal = Thermal(i)
+            self._thermal_list.append(thermal)
+
         # Initialize component list
         self._component_name_list.append(COMPONENT_BIOS)
         self._component_name_list.append(COMPONENT_CPLD1)

platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/psu.py

@@ -0,0 +1,240 @@
+#!/usr/bin/env python
+
+########################################################################
+# DellEMC S6000
+#
+# Module contains an implementation of SONiC Platform Base API and
+# provides the PSUs' information which are available in the platform
+#
+########################################################################
+
+
+try:
+    import os
+    from sonic_platform_base.psu_base import PsuBase
+    from sonic_platform.eeprom import Eeprom
+except ImportError as e:
+    raise ImportError(str(e) + "- required module not found")
+
+
+class Psu(PsuBase):
+    """DellEMC Platform-specific PSU class"""
+
+    CPLD_DIR = "/sys/devices/platform/dell-s6000-cpld.0/"
+    I2C_DIR = "/sys/class/i2c-adapter/"
+
+    def __init__(self, psu_index):
+        # PSU is 1-based in DellEMC platforms
+        self.index = psu_index + 1
+        self.psu_presence_reg = "psu{}_prs".format(psu_index)
+        self.psu_status_reg = "powersupply_status"
+
+        if self.index == 1:
+            ltc_dir = self.I2C_DIR + "i2c-11/11-0042/hwmon/"
+        else:
+            ltc_dir = self.I2C_DIR + "i2c-11/11-0040/hwmon/"
+        hwmon_node = os.listdir(ltc_dir)[0]
+        self.HWMON_DIR = ltc_dir + hwmon_node + '/'
+
+        self.psu_voltage_reg = self.HWMON_DIR + "in1_input"
+        self.psu_current_reg = self.HWMON_DIR + "curr1_input"
+        self.psu_power_reg = self.HWMON_DIR + "power1_input"
+
+        self.eeprom = Eeprom(is_psu=True, psu_index=self.index)
+
+        # Overriding _fan_list class variable defined in PsuBase, to
+        # make it unique per Psu object
+        self._fan_list = []
+
+    def _get_cpld_register(self, reg_name):
+        # On successful read, returns the value read from given
+        # reg_name and on failure returns 'ERR'
+        rv = 'ERR'
+        cpld_reg_file = self.CPLD_DIR + reg_name
+
+        if (not os.path.isfile(cpld_reg_file)):
+            return rv
+
+        try:
+            with open(cpld_reg_file, 'r') as fd:
+                rv = fd.read()
+        except:
+            rv = 'ERR'
+
+        rv = rv.rstrip('\r\n')
+        rv = rv.lstrip(" ")
+        return rv
+
+    def _get_i2c_register(self, reg_file):
+        # On successful read, returns the value read from given
+        # reg_name and on failure returns 'ERR'
+        rv = 'ERR'
+
+        if (not os.path.isfile(reg_file)):
+            return rv
+
+        try:
+            with open(reg_file, 'r') as fd:
+                rv = fd.read()
+        except:
+            rv = 'ERR'
+
+        rv = rv.rstrip('\r\n')
+        rv = rv.lstrip(" ")
+        return rv
+
+    def get_name(self):
+        """
+        Retrieves the name of the device
+
+        Returns:
+            string: The name of the device
+        """
+        return "PSU{}".format(self.index)
+
+    def get_presence(self):
+        """
+        Retrieves the presence of the Power Supply Unit (PSU)
+
+        Returns:
+            bool: True if PSU is present, False if not
+        """
+        status = False
+        psu_presence = self._get_cpld_register(self.psu_presence_reg)
+        if (psu_presence != 'ERR'):
+            psu_presence = int(psu_presence)
+            if psu_presence:
+                status = True
+
+        return status
+
+    def get_model(self):
+        """
+        Retrieves the part number of the PSU
+
+        Returns:
+            string: Part number of PSU
+        """
+        return self.eeprom.part_number_str()
+
+    def get_serial(self):
+        """
+        Retrieves the serial number of the PSU
+
+        Returns:
+            string: Serial number of PSU
+        """
+        # Sample Serial number format "US-01234D-54321-25A-0123-A00"
+        return self.eeprom.serial_number_str()
+
+    def get_status(self):
+        """
+        Retrieves the operational status of the PSU
+
+        Returns:
+            bool: True if PSU is operating properly, False if not
+        """
+        status = False
+        psu_status = self._get_cpld_register(self.psu_status_reg)
+        if (psu_status != 'ERR'):
+            psu_status = (int(psu_status, 16) >> ((2 - self.index) * 4)) & 0xF
+            if (~psu_status & 0b1000) and (~psu_status & 0b0100):
+                status = True
+
+        return status
+
+    def get_voltage(self):
+        """
+        Retrieves current PSU voltage output
+
+        Returns:
+            A float number, the output voltage in volts,
+            e.g. 12.1
+        """
+        psu_voltage = self._get_i2c_register(self.psu_voltage_reg)
+        if (psu_voltage != 'ERR') and self.get_status():
+            # Converting the value returned by driver which is in
+            # millivolts to volts
+            psu_voltage = float(psu_voltage) / 1000
+        else:
+            psu_voltage = 0.0
+
+        return psu_voltage
+
+    def get_current(self):
+        """
+        Retrieves present electric current supplied by PSU
+
+        Returns:
+            A float number, electric current in amperes,
+            e.g. 15.4
+        """
+        psu_current = self._get_i2c_register(self.psu_current_reg)
+        if (psu_current != 'ERR') and self.get_status():
+            # Converting the value returned by driver which is in
+            # milliamperes to amperes
+            psu_current = float(psu_current) / 1000
+        else:
+            psu_current = 0.0
+
+        return psu_current
+
+    def get_power(self):
+        """
+        Retrieves current energy supplied by PSU
+
+        Returns:
+            A float number, the power in watts,
+            e.g. 302.6
+        """
+        psu_power = self._get_i2c_register(self.psu_power_reg)
+        if (psu_power != 'ERR') and self.get_status():
+            # Converting the value returned by driver which is in
+            # microwatts to watts
+            psu_power = float(psu_power) / 1000000
+        else:
+            psu_power = 0.0
+
+        return psu_power
+
+    def get_powergood_status(self):
+        """
+        Retrieves the powergood status of PSU
+        Returns:
+            A boolean, True if PSU has stablized its output voltages and
+            passed all its internal self-tests, False if not.
+        """
+        status = False
+        psu_status = self._get_cpld_register(self.psu_status_reg)
+        if (psu_status != 'ERR'):
+            psu_status = (int(psu_status, 16) >> ((2 - self.index) * 4)) & 0xF
+            if (psu_status == 0x2):
+                status = True
+
+        return status
+
+    def get_status_led(self):
+        """
+        Gets the state of the PSU status LED
+
+        Returns:
+            A string, one of the predefined STATUS_LED_COLOR_* strings.
+        """
+        if self.get_powergood_status():
+            return self.STATUS_LED_COLOR_GREEN
+        else:
+            return self.STATUS_LED_COLOR_OFF
+
+    def set_status_led(self, color):
+        """
+        Sets the state of the PSU status LED
+        Args:
+            color: A string representing the color with which to set the
+                   PSU status LED
+        Returns:
+            bool: True if status LED state is set successfully, False if
+                  not
+        """
+        # In S6000, the firmware running in the PSU controls the LED
+        # and the PSU LED state cannot be changed from CPU.
+        return False